How often do you hear the words "NEGATIVE worm load" from your vet?? I was so excited! I have been using Worm Formula #2 in conjunction with another herbal since last April and had all three of my goats tested for the first time last week. We were both so surprised that they had no worms at all! (Especially considering I haven't been as faithful to administering their herbs as I should.) I am very happy with this product and will DEFINITELY continue using it! 5 stars all the way!!